How can a PHP beginner effectively implement a form to pass selected dropdown values for database queries without reloading the page?

To implement a form to pass selected dropdown values for database queries without reloading the page, you can use JavaScript to handle the form submission asynchronously. This can be achieved by using AJAX to send the form data to a PHP script that processes the database query and returns the results without refreshing the page. 

<?php
// PHP script to handle form submission and database query

if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Get the selected dropdown value from the form
    $selectedValue = $_POST['dropdown'];

    // Perform database query using the selected value
    // Replace this with your actual database query code
    $results = your_database_query_function($selectedValue);

    // Return the results as JSON
    echo json_encode($results);
}
?>

Keywords

PHP form submission AJAX database query dropdown menu

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